Has anyone else have this going on? I recently aquired a Ruger #1A, 7x57 my dream rifle. I went to the shop after mounting the Leupold VX-II, 2x7 to boresight and bench sight, the shop only had two rounds of Winchester 145 grs. the first round was two inches high at 100 yards, ok, round two 1/2" right, I'm happy. The past week I found 4 boxes of Remington 140 gr., I bought them all. I went out today and tried her out with the new ammo. The first two shots were at the same POI as the Winchester load from the week before but, round 3 went 1 1/2" higher, round 4 went 3" higher, then they were all either high or low but windage was perfect. I let the barrel cool for 1/2 hour and it went to the original position. I guessing it is from the light barrel weight or is it the ! in 8 1/2" twist with the 140 grain bullets? Thanks for your replies, Greg
